Can blue board be glassed with polyester resin?

Discussion in 'Fiberglass and Composite Boat Building' started by therigwelder, Feb 13, 2012.

  1. therigwelder
    Joined: Jan 2012
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    therigwelder Junior Member

    Can blue board be glassed with poly?
     
  2. lewisboats
    Joined: Oct 2002
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    Location: Iowa

    lewisboats Obsessed Member

    I am assuming you are talking about extruded poly styrene from Home Dumpo or Lowe-st...no. Polyester will melt the styrene into goo. You would have to use epoxy for that.
     
  3. ondarvr
    Joined: Dec 2005
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    ondarvr Senior Member

    There are some polyesters that will work, but you need to special order it.
     
  4. lewisboats
    Joined: Oct 2002
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    lewisboats Obsessed Member

    I would expect that they would cost close to the same as epoxy so I don't see the benefit.
     
  5. tropicalbuilder
    Joined: Jun 2010
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    tropicalbuilder Junior Member

    i've been able to use poly over styrofoam priming the styrofoam with white glue.
    The vinil based white glue used by carpenters for wood.
    As my foam was white i put some black pigment in the glue so to be able to see any void while painting.
    I also found that it is better to prime with one coat of resin, let it set and then go on with the laminations.
     
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  6. Herman
    Joined: Oct 2004
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    Herman Senior Member

    You can apply a layer of the special polyester, and after cure laminate further with normal polyester. That is the benefit.
     

  7. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    Correct, and the cost is less than epoxy.
     
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